This function allows the user to extend surface. Clicking on this button to select a surface to be extended, the control mesh for the selected surface will be highlighted, and four highlighted points will appear in four directions of the surface boundary, as shown in Figure 5.2.23. If there is only one surface in the display area, the program will directly pop up the Surface Extend dialog box.
Figure 5.2.23 Surface Extend
SELECT SURFACE
This function allows the user to select a surface to extend.
DISTANCE
This function is used to display or enter the extended distance. The user can extend surface via the four highlighted points on boundary of the selected surface. Point the cursor to an arbitrary point to display a red arrow, as shown in Figure 5.2.24. Then hold and drag the left mouse button to extend the surface towards this direction. The extended distance of surface will be shown in the Distance field. The user can also input a specific distance manually in the Distance field. After entering a specific distance value, click APPLY INPUT VALUE to confirm. Click APPLY to complete this operation.
Figure 5.2.24 Surface Extend Direction
NOTE: When using this function, the surfaces to be extended must be untrimmed surfaces for outer boundary.